What’s Vulnerable › Vulnerabilities

CVE-2026-73232: ffuf denial of service (OOM) via HTTP response decompression bomb

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-11 · updated 2026-09-18
• Weakness: CWE-409

Description

ffuf is a fast web fuzzer written in Go. Prior to 2.2.0, ffuf allows a malicious target server to cause an out-of-memory denial of service because the response size guard in pkg/runner/simple.go checks only the compressed Content-Length while io.ReadAll reads gzip, brotli, deflate, transparently decompressed, or chunked response bodies without a decompressed-size bound. This issue is fixed in version 2.2.0.

Affected products

• ffuf: before 2.2.0

References

• https://github.com/ffuf/ffuf/commit/fb0da86c60443b0dddbc9a86e91e3a6487dff79b
• https://github.com/ffuf/ffuf/pull/897
• https://github.com/ffuf/ffuf/releases/tag/v2.2.0
• https://github.com/ffuf/ffuf/security/advisories/GHSA-jcvh-xf52-2cwm

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